xpertrat | f74ab1efa874c19f32108d0719951e9b2a6ab0bb9f9b66c53145e75efec1684b

Bypass User Account Control

T1088

Disabling Security Tools

Modify Registry

Processes:

09fefe8f2d0e20847f08ebd26e29741f.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	09fefe8f2d0e20847f08ebd26e29741f.exe

Windows security bypass 2 TTPs 1 IoCs

Disabling Security Tools

Modify Registry

Processes:

09fefe8f2d0e20847f08ebd26e29741f.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UACDisableNotify = "0"	09fefe8f2d0e20847f08ebd26e29741f.exe

XpertRAT
XpertRAT is a remote access trojan with various capabilities.
rat xpertrat

XpertRAT Core payload 1 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1448-187-0x0000000000400000-0x0000000000443000-memory.dmp	xpertrat

Adds policy Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

Processes:

iexplore.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\run	iexplore.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\run\P0U4N118-N5L3-W331-B1K0-Y2V3O6B8B2Q6 = "C:\\Users\\Admin\\AppData\\Roaming\\P0U4N118-N5L3-W331-B1K0-Y2V3O6B8B2Q6\\P0U4N118-N5L3-W331-B1K0-Y2V3O6B8B2Q6.exe"	iexplore.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

09fefe8f2d0e20847f08ebd26e29741f.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1675742406-747946869-1029867430-1000\Control Panel\International\Geo\Nation	09fefe8f2d0e20847f08ebd26e29741f.exe

Windows security modification 2 TTPs 1 IoCs

Disabling Security Tools

Modify Registry

Processes:

09fefe8f2d0e20847f08ebd26e29741f.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UACDisableNotify = "0"	09fefe8f2d0e20847f08ebd26e29741f.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

Processes:

iexplore.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-1675742406-747946869-1029867430-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1675742406-747946869-1029867430-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\P0U4N118-N5L3-W331-B1K0-Y2V3O6B8B2Q6 = "C:\\Users\\Admin\\AppData\\Roaming\\P0U4N118-N5L3-W331-B1K0-Y2V3O6B8B2Q6\\P0U4N118-N5L3-W331-B1K0-Y2V3O6B8B2Q6.exe"	iexplore.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run	iexplore.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\P0U4N118-N5L3-W331-B1K0-Y2V3O6B8B2Q6 = "C:\\Users\\Admin\\AppData\\Roaming\\P0U4N118-N5L3-W331-B1K0-Y2V3O6B8B2Q6\\P0U4N118-N5L3-W331-B1K0-Y2V3O6B8B2Q6.exe"	iexplore.exe

Checks whether UAC is enabled 1 TTPs 1 IoCs

System Information Discovery

T1082

Processes:

09fefe8f2d0e20847f08ebd26e29741f.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	09fefe8f2d0e20847f08ebd26e29741f.exe

Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

4272 1544 WerFault.exe iexplore.exe

pid	pid_target	process	target process
4272	1544	WerFault.exe	iexplore.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

09fefe8f2d0e20847f08ebd26e29741f.exe09fefe8f2d0e20847f08ebd26e29741f.exe

description	pid	process	target process
PID 3940 set thread context of 1352	3940	09fefe8f2d0e20847f08ebd26e29741f.exe	09fefe8f2d0e20847f08ebd26e29741f.exe
PID 1352 set thread context of 1544	1352	09fefe8f2d0e20847f08ebd26e29741f.exe	iexplore.exe
PID 1352 set thread context of 1448	1352	09fefe8f2d0e20847f08ebd26e29741f.exe	iexplore.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exe

pid process

2520 schtasks.exe

pid	process
2520	schtasks.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

Processes:

09fefe8f2d0e20847f08ebd26e29741f.exepowershell.exe09fefe8f2d0e20847f08ebd26e29741f.exe

pid	process
3940	09fefe8f2d0e20847f08ebd26e29741f.exe
3940	09fefe8f2d0e20847f08ebd26e29741f.exe
3632	powershell.exe
1352	09fefe8f2d0e20847f08ebd26e29741f.exe
1352	09fefe8f2d0e20847f08ebd26e29741f.exe
3632	powershell.exe
1352	09fefe8f2d0e20847f08ebd26e29741f.exe
1352	09fefe8f2d0e20847f08ebd26e29741f.exe
1352	09fefe8f2d0e20847f08ebd26e29741f.exe
1352	09fefe8f2d0e20847f08ebd26e29741f.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

09fefe8f2d0e20847f08ebd26e29741f.exepowershell.exeiexplore.exe

description	pid	process
Token: SeDebugPrivilege	3940	09fefe8f2d0e20847f08ebd26e29741f.exe
Token: SeDebugPrivilege	3632	powershell.exe
Token: SeDebugPrivilege	1448	iexplore.exe

Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

09fefe8f2d0e20847f08ebd26e29741f.exeiexplore.exe

pid process

1352 09fefe8f2d0e20847f08ebd26e29741f.exe
1448 iexplore.exe

pid	process
1352	09fefe8f2d0e20847f08ebd26e29741f.exe
1448	iexplore.exe

Suspicious use of WriteProcessMemory 29 IoCs

Processes:

09fefe8f2d0e20847f08ebd26e29741f.exe09fefe8f2d0e20847f08ebd26e29741f.exe

description	pid	process	target process
PID 3940 wrote to memory of 3632	3940	09fefe8f2d0e20847f08ebd26e29741f.exe	powershell.exe
PID 3940 wrote to memory of 3632	3940	09fefe8f2d0e20847f08ebd26e29741f.exe	powershell.exe
PID 3940 wrote to memory of 3632	3940	09fefe8f2d0e20847f08ebd26e29741f.exe	powershell.exe
PID 3940 wrote to memory of 2520	3940	09fefe8f2d0e20847f08ebd26e29741f.exe	schtasks.exe
PID 3940 wrote to memory of 2520	3940	09fefe8f2d0e20847f08ebd26e29741f.exe	schtasks.exe
PID 3940 wrote to memory of 2520	3940	09fefe8f2d0e20847f08ebd26e29741f.exe	schtasks.exe
PID 3940 wrote to memory of 1352	3940	09fefe8f2d0e20847f08ebd26e29741f.exe	09fefe8f2d0e20847f08ebd26e29741f.exe
PID 3940 wrote to memory of 1352	3940	09fefe8f2d0e20847f08ebd26e29741f.exe	09fefe8f2d0e20847f08ebd26e29741f.exe
PID 3940 wrote to memory of 1352	3940	09fefe8f2d0e20847f08ebd26e29741f.exe	09fefe8f2d0e20847f08ebd26e29741f.exe
PID 3940 wrote to memory of 1352	3940	09fefe8f2d0e20847f08ebd26e29741f.exe	09fefe8f2d0e20847f08ebd26e29741f.exe
PID 3940 wrote to memory of 1352	3940	09fefe8f2d0e20847f08ebd26e29741f.exe	09fefe8f2d0e20847f08ebd26e29741f.exe
PID 3940 wrote to memory of 1352	3940	09fefe8f2d0e20847f08ebd26e29741f.exe	09fefe8f2d0e20847f08ebd26e29741f.exe
PID 3940 wrote to memory of 1352	3940	09fefe8f2d0e20847f08ebd26e29741f.exe	09fefe8f2d0e20847f08ebd26e29741f.exe
PID 1352 wrote to memory of 1544	1352	09fefe8f2d0e20847f08ebd26e29741f.exe	iexplore.exe
PID 1352 wrote to memory of 1544	1352	09fefe8f2d0e20847f08ebd26e29741f.exe	iexplore.exe
PID 1352 wrote to memory of 1544	1352	09fefe8f2d0e20847f08ebd26e29741f.exe	iexplore.exe
PID 1352 wrote to memory of 1544	1352	09fefe8f2d0e20847f08ebd26e29741f.exe	iexplore.exe
PID 1352 wrote to memory of 1544	1352	09fefe8f2d0e20847f08ebd26e29741f.exe	iexplore.exe
PID 1352 wrote to memory of 1544	1352	09fefe8f2d0e20847f08ebd26e29741f.exe	iexplore.exe
PID 1352 wrote to memory of 1544	1352	09fefe8f2d0e20847f08ebd26e29741f.exe	iexplore.exe
PID 1352 wrote to memory of 1544	1352	09fefe8f2d0e20847f08ebd26e29741f.exe	iexplore.exe
PID 1352 wrote to memory of 1448	1352	09fefe8f2d0e20847f08ebd26e29741f.exe	iexplore.exe
PID 1352 wrote to memory of 1448	1352	09fefe8f2d0e20847f08ebd26e29741f.exe	iexplore.exe
PID 1352 wrote to memory of 1448	1352	09fefe8f2d0e20847f08ebd26e29741f.exe	iexplore.exe
PID 1352 wrote to memory of 1448	1352	09fefe8f2d0e20847f08ebd26e29741f.exe	iexplore.exe
PID 1352 wrote to memory of 1448	1352	09fefe8f2d0e20847f08ebd26e29741f.exe	iexplore.exe
PID 1352 wrote to memory of 1448	1352	09fefe8f2d0e20847f08ebd26e29741f.exe	iexplore.exe
PID 1352 wrote to memory of 1448	1352	09fefe8f2d0e20847f08ebd26e29741f.exe	iexplore.exe
PID 1352 wrote to memory of 1448	1352	09fefe8f2d0e20847f08ebd26e29741f.exe	iexplore.exe

System policy modification 1 TTPs 1 IoCs

evasion

Modify Registry

Processes:

09fefe8f2d0e20847f08ebd26e29741f.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	09fefe8f2d0e20847f08ebd26e29741f.exe

C:\Users\Admin\AppData\Local\Temp\09fefe8f2d0e20847f08ebd26e29741f.exe
"C:\Users\Admin\AppData\Local\Temp\09fefe8f2d0e20847f08ebd26e29741f.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3940

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\tQcdUx.exe"
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3632

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\tQcdUx" /XML "C:\Users\Admin\AppData\Local\Temp\tmp319F.tmp"
2⤵
- Creates scheduled task(s)
PID:2520

C:\Users\Admin\AppData\Local\Temp\09fefe8f2d0e20847f08ebd26e29741f.exe
"C:\Users\Admin\AppData\Local\Temp\09fefe8f2d0e20847f08ebd26e29741f.exe"
2⤵
- UAC bypass
- Windows security bypass
- Windows security modification
- Checks whether UAC is enabled
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
- System policy modification
PID:1352

C:\Program Files (x86)\Internet Explorer\iexplore.exe
C:\Users\Admin\AppData\Local\Temp\09fefe8f2d0e20847f08ebd26e29741f.exe
3⤵
PID:1544

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1544 -s 84
4⤵
- Program crash
PID:4272

C:\Program Files (x86)\Internet Explorer\iexplore.exe
C:\Users\Admin\AppData\Local\Temp\09fefe8f2d0e20847f08ebd26e29741f.exe
3⤵
- Adds policy Run key to start application
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:1448

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 284 -p 1544 -ip 1544
1⤵
PID:2728

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Registry Run Keys / Startup Folder

2

T1060

Scheduled Task

T1053

Privilege Escalation

Bypass User Account Control

T1088

Scheduled Task

T1053

Defense Evasion

Bypass User Account Control

T1088

Disabling Security Tools

3

Modify Registry

6

Credential Access

Discovery

Query Registry